to copyright, or not to copywrite

http://www.ultimate-guitar.com/columns/general_music/copyright_your_music.html

read that

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so yeah the articles about this guy whose telling us we needa copyright our songs, why? because there's nefarious characters out there waiting to copyright it if we do not, all they need to do is send a cd in with 30 dollars and its now saved as their work. but really, im not sure how important this really is. firstly i wanna learn more about this shit, like where are these copyright offices, and what exactly am i getting if i pay them their fee. i was thinking of taking all the mp3s ive done in october and sticking them on a cd, then if anyone wanted music i could give it em but eyeah ifi did this id mail them the cd and theyd send me back a copyright form with all the songs on it saved. so yeah. im not sure if i have to literally go through and type of each song name ( there's over two hundred of them ) and then fill out some form and then send them also 0 bucks. id rather visit the office, get info, then figure out if i want to do it. but yeah, whats kinda fuzzy to me is if i dont copyright it, and lets say someone does, or someone makes money off my osng, then what is teh crime thats being committed, and then what should i be bothered about. esentially its about money, making it, whether you are, or someone else is, off of an dieayou coined. essentially thats the bottom line. but im not really sure if its necessary to go and copyright this shit. its just an agreement between people about their own shit. but im not sure if its really all that important. lets say i did copyright it, then would i be able to go around and sell cds without fear and that sort.